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タバコ吸わないから真剣に調べたことないｗ
ただ、厚生労働省とか米国CDCなどの研究機関もタバコの害を述べてるから害があるんだと思ってるわ

https://www.cdc.gov/tobacco/data_statistics/fact_sheets/health_effects/effects_cig_smoking/index.htm

Smoking causes about 90% (or 9 out of 10) of all lung cancer deaths.More women die from lung cancer each year than from breast cancer.

Smoking causes about 80% (or 8 out of 10) of all deaths from chronic obstructive pulmonary disease (COPD).

Cigarette smoking increases risk for death from all causes in men and women.